Graphing Circles and Writing Equations

Front

What is the standard equation of a circle with center (h, k) and radius r?

Back

Tags

CCSS.HSG.GPE.A.1

Front

If the center of a circle is at (3, -2) and the radius is 5, what is the equation of the circle?

Back

Tags

CCSS.HSG.GPE.A.1

Front

What does the term 'radius' refer to in a circle?

Back

The radius is the distance from the center of the circle to any point on its circumference.

Front

How do you find the radius from the equation of a circle?

Back

Tags

CCSS.HSG.GPE.A.1

Front

Back

The center is (-4, 1).

Tags

CCSS.HSG.GPE.A.1

Front

Back

The radius is 4.

Tags

CCSS.HSG.GPE.A.1

Front

Back

The number 9 represents the square of the radius, so the radius is 3.

Tags

CCSS.HSG.GPE.A.1

Front

Back

Changing h moves the circle left or right along the x-axis.

Tags

CCSS.HSG.GPE.A.1

Front

What happens to the circle if the radius is increased?

Back

The circle becomes larger, expanding outward from the center.

Tags

CCSS.HSG.CO.A.2

Front

What is the equation of a circle with center (0, 0) and radius 1?

Back

Tags

CCSS.HSG.GPE.A.1